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GLM 4.5 Air vs GPT 5.6 Luna

At a glance
Zhipu AIGLM 4.5 Air

Lightweight GLM 4.5 variant for fast, cost-efficient inference.

131K ctx$0.13/$0.85 per M
OpenAIGPT 5.6 Luna

OpenAI's fastest, most affordable GPT-5.6 tier for high-volume, latency-sensitive work.

1.1M ctx$1.00/$6.00 per M
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
Zhipu AIGLM 4.5 Air
Reasoning
CodingInsufficient data
AgenticInsufficient data
ReasoningInsufficient data
MathInsufficient data
Sources:Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Reasoning & Knowledge
Graduate Science—Expert-Level8.1%
Agentic
Terminal Tasks—
OpenAIGPT 5.6 Luna
Reasoning
CodingInsufficient data
MathInsufficient data
Sources:Provider·OpenRouter· as of 2026-07-11
Reasoning & Knowledge
Graduate Science92.3%Expert-Level—
Agentic
Terminal Tasks84.7%
Specs
Zhipu AIGLM 4.5 Air
131K
Context
98K
Max output
Jul 2025
Released
OpenAIGPT 5.6 Luna
1.1M
Context
128K
Max output
Jul 2026
Released
Capabilities
Zhipu AIGLM 4.5 Air
Vision
Audio
Reasoning
OpenAIGPT 5.6 Luna
Vision
Audio
Reasoning
Pricing
Zhipu AIGLM 4.5 Air
Live pricing, shown before you run
Input$0.13/M tokens
Output$0.85/M tokens
Cache read$0.02/M tokens
OpenAIGPT 5.6 Luna
Live pricing, shown before you run
Input$1.00/M tokens
Output$6.00/M tokens
Cache read$0.10/M tokens
Web search$0.01/search
Chat with GLM 4.5 AirGo to model
Chat with GPT 5.6 LunaGo to model
Frequently Asked Questions: GLM 4.5 Air vs GPT 5.6 Luna▼

Which is better, GLM 4.5 Air or GPT 5.6 Luna?

▼

Both GLM 4.5 Air and GPT 5.6 Luna are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.

Which is cheaper, GLM 4.5 Air or GPT 5.6 Luna?

▼

GLM 4.5 Air has a lower blended cost. GLM 4.5 Air: $0.13 input / $0.85 output. GPT 5.6 Luna: $1.00 input / $6.00 output.

Which has a larger context window, GLM 4.5 Air or GPT 5.6 Luna?

▼

GPT 5.6 Luna has a larger context window: GLM 4.5 Air supports 131K tokens vs GPT 5.6 Luna at 1.1M tokens.

Do both GLM 4.5 Air and GPT 5.6 Luna support vision?

▼

GPT 5.6 Luna supports vision/image input, but GLM 4.5 Air does not.

What are the key differences between GLM 4.5 Air and GPT 5.6 Luna?

▼

Key differences: GLM 4.5 Air is significantly cheaper; only GPT 5.6 Luna supports vision input. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both GLM 4.5 Air and GPT 5.6 Luna for free on idapt.app to see which performs better for your specific needs.

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